# System test shall continue until all significant product risks have been covered to the extent specified in the product risk analysis document.
# System test shall continue until no must-fix defects remain against any significant product risks specified in the product risk analysis document.
During test execution, the test team detects 430 must-fix defects prior to release and all must-fix defects are resolved. After release, the customers find 212 new defects, none of which were detected during testing. This means that only 67% of the important defects were found prior to release, a percentage which is well below average in your industry. You are asked to find the root cause for the high number of field failures. Consider the following list of explanations:
I. Not all the tests planned for the significant product risks were executed.
II. The organization has unrealistic expectations of the percentage of defects that testing can find.
III. A version-control issue has resulted in the release of a version of the software that was used during early testing.
IV. The product risk analysis failed to identify all the important risks from a customer point of view.
V. The product risk analysis was not updated during the project as new information became available.
Which of the following statements indicate which explanations are possible root causes?